Technical Lead, Universal Gateway & AI APIs

Quantiphi; Charlotte (NC); On-site; USD 140,000 - 180,000; Full time

Job summary

Quantiphi is seeking an experienced backend engineer to design, develop, and harden a Universal Gateway that connects conversational AI agents to enterprise applications. The Gateway will manage conversation state, enforce business rules, execute authorized backend operations and return data and guidance to the agent.

You will design Gateway APIs used by Google CXAS agents, implement an external state engine for journey/state management, and ensure robust security, testing and deployment to

Qualifications

• Strong production backend development experience in Python, Java, preferably FastAPI or equivalent.
• REST APIs, OpenAPI specifications, JSON Schema and typed request/response validation.
• Experience with workflow engines, finite-state machines or business-process orchestration.
• Distributed systems concepts: concurrency, retries, timeouts and transaction boundaries.
• Experience with persistent data stores and session management.
• Google Cloud delivery experience, IAM, containerized services, logging, monitoring and secrets management.
• Enterprise API integration and automated unit, integration and contract testing.
• Understanding of LLM tool calling and distinction between model-generated intent and authorized execution.
• Git, code reviews and CI/CD.

Responsibilities

• Design and implement Gateway APIs used by Google CXAS agents, including session initialization and journey resolution.
• Implement a state engine for current journey, active state and pending actions.
• Define versioned journey configurations, rules, policies and state-specific response guidance.
• Ensure gateway validates actions against state, identity, authorization and rules.
• Implement timeouts, retries, idempotency, concurrency controls and recovery from partial failures.
• Persist session state and audit records with proper data isolation.
• Implement authentication, authorization, secrets management and service-to-service security.
• Provide traces showing the incoming request, policy decision, state before and after, backend operation and response.
• Integrate automated tests and AgentCert evidence into the workflow.
• Package and deploy services to Google Cloud including Cloud Run.
• Produce API documentation and runbooks.

Skills

Python

Java

REST APIs

Distributed systems

CI/CD

Git

Session management

Tools

FastAPI

OpenAPI

JSON Schema

Google Cloud

CI/CD

Git

Job description

Quantiphi is seeking an experienced backend engineer to design, develop, and harden a Universal Gateway that connects conversational AI agents to enterprise applications. The Gateway will manage conversation state, enforce business rules, execute authorized backend operations and return data and guidance to the agent.

You will design Gateway APIs used by Google CXAS agents, implement an external state engine for journey/state management, and ensure robust security, testing and deployment to